Baromembrane technology of milk processing

The article presents the results of research of micro-, ultra- and nanofiltration processes at curds production, processing of milk whey and skim milk concentrating. The authors have developed recommendations on launching the technology in the production using membranes of domestic production. The investigations were carried out in the laboratory of the Ural State Agrarian University and at the production site of the company The Yugov combine of milk products, at the Peasant Farm owned by Anikiev A.V. and at the Polevskoi milk combine. The parameters for obtaining UF curds on the membranes KUFE-19(0,01) produced by the company «Keramikfiltr» (Russia, Moscow) were established: the temperature of the coagulum formation was 55-60 °С, concentrating was carried out until the content of dry soluble matters in curds reached about 20 %. Concentrated skim milk was received at the temperatures 35-40 °C. During the process of the UF separation the concentrate of skim milk was received with the dry soluble matters content about 16 %. Whey was concentrated at the pilot plant produced by the company «Membrana» (Ekaterinburg). The plant consists of the UF and nanofiltration modules. In the ultrafiltration module the membranes KUFE-19 (0,02) were applied and in the nanofiltration module the membranes manufactured by the company «Vladipor». At the lactose concentrate production the solution was transported to the nano-filtration module without any preparation. In the course of the separation process, lactose concentrate was obtained in the form of the transparent solution of the intensive yellow-green color with the content of the dissolved dry matters more than 20%. The permeat received was actually water with a small quantity of dissolved salts (<1 %).

microfiltration, ultrafiltration, nanofiltration, whey, curds